Improvement in traverse motions



D WALKER.

Improvement in Traverse Moti'o'm` Pa-fe'nted1an.-1e,1s72.

UNITED STATES PATENT OFFICE. A.

DUNCAN WALKER, OF EAST HAMPTON, MASSACHUSETTS.

IMPROVEMENT IN TRAVERSE MOTIONS.

Specification forming part of Letters Patent No. 122,790, dated January16, 1872.

Specification describing a new and Improved Traverse Motion, invented byDUNCAN WALK- ER, of East Hampton, in the county of Hampshire and Stateof Massachusetts.

My invention consists ofathree-pointed starwheel, combined with a pairof inclined faces or cams, arranged on said bar reversely to each other,and on opposite sides of the wheel at one end of the traverse-bar, insuch manner that said faces are alternately acted upon by the saidstar-wheel, and the bar alternately moved in opposite directions, themovement in one direction beginning as soon as the movement in the otherceases, and the said movements being uniform in speed throughout theirwhole length, which is the essential object of the invention, anddistinguishes it from those arrangements in which the bar is moved byeccentrics, which give a variable motion to the bar, and allow it torest or move so slow at each end that the wear of the threads or ends 7on the leather rollers is very much greater at the extremes of themovements than between them.

Figure l is a plan view of my improved traverse motion as applied to thedraft-rollers of spinning machinery. Fig. 2 is a section of the sametaken on the line .r of Fig. l.

Similar letters of reference indicate corresponding parts. i

A represents the traverse-bar, which assumes the form of a wide plate,B, at onev end, in which is a large hole, whose walls, which areperpendicular to the bar, have each an inclined plane or cam, C, which,beginning at a corner of said hole, incline toward the center of it tosome extent, and stop at a line parallel with the bar A, and passingthrough the center of said hole. One of said cams is on the same side ofsaid center that the bar B is, and the other is 011 the opposite side. Dis a three-pointed starwheel arranged to revolve horizontally in saidhole on the axis of a worm-wheel, E, below, which is turned by a worm,F, on the shaft G of one ofthe draft-rollers. This star-wheel and thecams are so adjusted relatively to each other that one of the pointswill begin to act on one ofthe cams to move the bar in one direction atthe moment another point escapes from the other cam, and ceases to movesaid bar in the other direction.

These cams will not be straightinclines, but will have such form thatthe motion imparted to the bar by the revolving points will be uniformin respect 0I" speed throughout each movement.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with the traverse-bar and its cams CC', of the star-wheel D, all arrangedsubstantially as specified.

. DUNCAN WALKER.

Witnesses:

WILLIAM STRATTCN, CLARENCE E. WARE.

